Test has_one :dependent => :nullify with missing association. Closes #4828.

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@5594 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/CHANGELOG

@@ -39,7 +39,7 @@
 
 * Deprecation: object transactions warning.  [Jeremy Kemper]
 
-* has_one :dependent => :nullify ignores nil associates.  #6528 [janovetz, Jeremy Kemper]
+* has_one :dependent => :nullify ignores nil associates.  #4828, #6528 [bellis@deepthought.org, janovetz, Jeremy Kemper]
 
 * Oracle: resolve test failures, use prefetched primary key for inserts, check for null defaults, fix limited id selection for eager loading. Factor out some common methods from all adapters.  #6515 [Michael Schoen]
 

activerecord/test/associations_test.rb

@@ -345,6 +345,13 @@ class HasOneAssociationsTest < Test::Unit::TestCase
     firm.destroy
   end
 
+  def test_dependence_with_missing_association_and_nullify
+    Account.destroy_all
+    firm = DependentFirm.find(:first)
+    assert firm.account.nil?
+    firm.destroy
+  end
+
   def test_assignment_before_parent_saved
     firm = Firm.new("name" => "GlobalMegaCorp")
     firm.account = a = Account.find(1)